Fluid-pressure governor.



e. 0. HIGK, JR R. GTENYART.

TLUID PRESSURE GOVERNOR.

APPLICATION FILED JUNE 15, 1910.

ma ma Patented 001;. 18, 1910.

GEORGE C. HICKS,

JR., AND RALPH C. ENYART, 0F CONNERSVILLE, INDIANA, AS-

SIGNORS TO THE P. & E. M. ROOTS COMPANY, OF CONNEBSVILLE, IN DIANA.

FLUID-PRESSURE GOVERNOR.

Specification of Letters Patent.

' Patented Get. 18, 191%.

Application filedlJune 15, 1910. Serial No. 566,913.

To all whom it may concern:

Be it known that we, GEORGE C. HICKS, Jr., and RALPH C. ENYART, citizens of the United States, residing at. Conuersville, Fayette county, Indiana, have invented certain new and useful Improvements in Fluid- Pressure Governors, of which the following is a specification.

This invention relates to a governor for maintaining a practically constant pressure of fluid by causing variations in the produced pressure to modify the speed of the motor bringing aboutthe production of the pressure. Such governors, as a class, are not new, but cases arise in which considerable power is required in bringing about the speed-adjustment of the motor, as for instance, where a pressure-producing machine is driven by a steam engine having a variable cutofl of the riding valve type, and our present invention well lends itself to the adjustment of such cutofl valves, or to similar situations. I

The invention will be readily understood from the following description taken in connection with the accompanying drawing which is a vertical section of a governor exemplifying our invention.

In the drawing :1, indicates a pipe or receiver containing, under pressure, the fluid to be dealt with, which may be assumed as air, the pressure within this pipe representing the pressure which is to be kept constant or practically so: 2, a rotary shaft typical of a mechanical part whose turnings, in one direction or the other, are to bring about corrective'adjustments of the motor which is producing the pressure as,

for instance, the valve-gear of a steam en gine driving a blower, shaft 2 being illustrated in the present case as having a crank 7 upon it: 3, a connecting rod attached to crank 7 and serving simply to typify another mechanical means for carrying motion away from shaft 2 to bring about a speed adjustment of a motor: 4, a rotary motor, adapted to be driven in either direction by the pressure fluid, the motor being illustrated as having two impellers working in a casin like the well known Roots type of rotary lowers: 5, a passageleadin into one side of the casing of the blower an serving, according to circumstances, as an inlet or an outlet for the pressure fluid: 6, a similar passage connecting with the opposite side i of the casing of the motor, thesetwo passages terminating at points near each other:

crank is a gear engaging a pinion on the shaft of one ofthe impellers so that the turning of the impellers brings about the turning of shaft 2: 8, a supply conduit leadends of passages 5 and 6: 9, an exhaust conpassages 5 and 6: 10, a valve cooperating and exhaust conduit 9 in such manner that when the valve is in one position, the position shown in the drawing, no fluid will go fluid will go to passage 5 while passage 6 will be in communication with the exhaust and, in another position, fluid will go to passage '6 while passage 5 will i e in comvious from an inspection of the drawing: 11, a diaphra chamber: 12, a flexible diaphragm forming a wall of this chamber: 13, a conduit leading from pressure-pipe 1 to the diaphragm chamber and tending to distend the diaphragm: 14, a lever: 15,'a connection from the lever to the diaphragm to cause variations in the distention of the diaphragm to bring about variations in the position of the lever: 16, a lever connected with "valve 10 to serve in shifting that valve to its various functional positions: 17, a link connectin levers 14 and 16, this link being illustrated as being provided with a turnbuckle to serve in adjusting its length: 18, a spring connected with lever'14 and tending to resist the distention of the diaphragm under the 19, an adjusting screw for changing the ten-' sion of the spring.

tion is to be employed to be working under some given pressure which it is desired to hold constant, That pressure .will be acting so adjusted as to put lever 14 in condition of equilibrium with valve 10 in completely closed positien. Under these conditions the governor will not beerforming any duty, but will stand readyv or duty. If, now, the pressure in the system rises above the normal it will bringabout an increased distention of the diaphragm, and this will obviously result in so shi ting valve 10 that pressureduit leading from a point near the ends of munication with the exhaust, as will be ob influence of the pressure acting upon it: and

Assume the system with which this inven- 7,the crank previously referred to, which ing from pressure-pipe 1 to a point near the I with passages 5 and 6 and supply-conduit 8 upon diaphragm 12, and spring 18 is to be 70 V to the motor 4 and, when in another position,

fluid will go through passage 6 to the motor, causing the rotation of the motor, the fluid exhausting from the motor through passage 5. Theturning of the motor brings about a turning of shaft 2 or movement of connection 3 to effect a proper speed correction of the engine supplying the system with pressure fluid, such speed correction slowing the engine and causing the pressure in the system to get back to normal, whereupon the diaphragm takes its original position, closing valve 10 and stopping the motor. If, on the other hand, the pressure in the system should fall below the normal, then spring 18 will have'a preponderating effect over diaphragm 12 and the distention of the diaphragm will lessen, and the valve will go to a position causing the motor to turn in a direction opposite to the direction previously referred to, and bring about an adjustment to quicken the speed of the engine producing the pressure, the governor-motor ceasing to operate when the pressure shall have been restored to normal.

We claim 1. A fluid-pressure governor comprising, a reversible rotary governor-motor adapted for the adjustment of the speed-controlling part of a pressure-producing motor, a reversing valve for said governor-motor, a chamher, a movable wall to said chamber, an adjustable resistance connected with said wall, a connection between said wall and valve, a

' conduit to supply said chamber with fluid'at working pressure of the system, and a supply conduit to convey fluid to the reversing valve, combined substantially as set forth.

2. A fluid pressure governor comprising, a rotary governor-motor adapted for rotation in either direction, a part driven thereby and adapted for connection with a pressure-producing motor, a pipe charged with the pressure-fluid whose pressure is to be passages connected with the governor-motor, an exhaust outlet for the governor-motor, a supply-conduit from said pipe to the motor, a valve cooperating with said supply conduit and passages and exhaust outlet to governed,

bring about the turning of the governormotor in one direction or the other, a diaphragm chamber connected with the firstmentioned pipe, a diaphragm forming a wall of said chamber and held under distention by the Working pressure of the system, an adjustable spring resisting the distention of the diaphragm, and connections from the diaphragm to the valve to cause abnormal distentions of the diaphragm to bring about the turning of the governor-motor in one direction or the other, combined substantially as set forth.

GEORGE G. HICKS, JR. RALPH C. ENYART. Witnesses:

J. F. SoHWnIKLn, J. M. SHADE. 

